Performance Enhancement of the P3HT/PCBM Solar Cells through NIR Sensitization Using a Small‐Bandgap Polymer

Ameri, Tayebeh; Min, Jie; Li, Ning; Machui, Florian; Baran, Derya; Förster, Michael; Schottler, Kristina J.; Dolfen, Daniel; Scherf, Ullrich; Brabec, Christoph J.

doi:10.1002/aenm.201200219

Cited by 204 publications

(189 citation statements)

References 21 publications

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“…We also tried to discover whether there might be a characteristic length of the side chains at which the electronic properties would remain unchanged; this might be suitable for use as a modeling approach. We chose to study poly(3-hexylthiophene) (P3HT), a polymer widely used in organic devices (Figure 1) [8][9][10][20][21][22][23][24] . This polymer has a hexyl side chain in each monomer unit.…”

Section: Introductionmentioning

confidence: 99%

Effect of the length of alkyl side chains in the electronic structure of conjugated polymers

Oliveira

Lavarda

2014

Mat. Res.

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Computational modeling studies of conjugated polymers have been shown to present many challenges. Dne such challenge is to find ways to reduce the computational cost for these studies without compromising the quality of the results. An approach longly used in the literature for this purpose is replacing long alkyl side chains (with six or more carbons) with a methyl group. This work reports on a theoretical study conducted with the conjugated polymer poly(3-hexylthiophene), which contains a hexyl side chain attached to the monomer, to verify the influence of the size of the alkyl side chain on its electronic structure. The results indicated that, for polymers containing long alkyl side chains, replacement with a propyl group offered full saturation of all properties under review, showing it to be a good approach.

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Section: Introductionmentioning

confidence: 99%

Effect of the length of alkyl side chains in the electronic structure of conjugated polymers

Oliveira

Lavarda

2014

Mat. Res.

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“…Various sensitizers based on low band gap polymers [55][56][57][58][59][60][61][62][63], small molecules [64][65][66], dyes [67][68][69] and nanoparticles [13][14][15][16][17][18][19][20][21] are employed in the structure of the photoactive layer in combination with donor material which is usually consists of a large bandgap polymer and fullerene derivative as acceptor. Recently, the record PCEs over 12% have been reported for the PBDB-T:IT-M: BisPC 70 BM (1:1:0.2) ternary solar cells with a Jsc=17.3 mA/cm², Voc=0.95 V and FF=74% [42], which demonstrate the potential of ternary sensitization concept for OPVs' upscaling.…”

Section: Ternary Solar Cellsmentioning

confidence: 99%

“…Han et al [100] added 5 wt% InP QDs into the PTB7:PC 71 BM host matrix and reported a maximum PCE of 8.4% for the ternary device due to the increase in J SC and FF by the synergy effect of InP QDs and the used Poly [(9,9-bis(3'-(N,N-dimethylamino)propyl)-2,7-fluorene)-alt-2,7-(9,9-dioctylfluorene)] (PFN) interlayer. In 2016 our research group fabricated hybrid solar cells based on pDPP5T-2 electron donating polymer, PC 61 BM and cadmium selenide telluride (CdSe X Te 1-X ) QDs and evaluated the photovoltaic performance and optoelectronic properties of the prepared devices as a function of QDs loading. The power conversion efficiency of the fabricated hybrid solar cells was improved up to 5.11% for the device containing 4 wt% of CdSe X Te 1-X QDs which found to be mainly due to the enhancement in short circuit current density resulted from the enlarged light harvesting potential of the photoactive layer [17].…”

Section: Hybrid Qd Based Solar Cellsmentioning

confidence: 99%

Recent Developments in Quantum Dots/CNT Co-Sensitized Organic Solar Cells

Soltani¹,

Katbab²,

Ameri³

2017

J Material Sci Eng

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Polymer solar cells (PSCs) are emerging alternative candidates to the standard silicone technology for green and renewable energy generation owing to their flexibility and solution processability. Bulk heterojunction (BHJ) organic solar cells (OSCs) based on conjugated semiconducting polymers as donor (D) and fullerene derivatives as acceptor (A) offer large D/A interfacial area, which overcomes the short exciton diffusion length. Although, recent advances in narrow band gap semiconducting polymers have led to the improvement in power conversion efficiency of organic photovoltaics (OPVs) beyond 10%, inefficient charge separation and low carrier mobility as well as negligible photon harvesting in near-infrared (NIR) and/or infrared (IR) region of the solar spectrum have still remained as bottle neck for ultimate performance of OPVs. Most PSCs only absorb the UV-visible part of the solar spectrum, leading to the low light harvesting efficiency. Hence, solution processed photoactive materials comprising nanostructured semiconducting inorganic quantum dots (QDs) as sensitizer have attracted great attention to improve energy conversion efficiency of the OPVs. This is attributed to the outstanding optoelectronic properties of QDs such as band gap tunability, potential NIR photons harvesting and multi exciton generation (MEG). However, the main shortcoming of inorganic QDs based OSCs is randomly hopping charge transport among discrete QD particles, which can be tackled through hybridization with one dimensional (1D) electrically conductive nanostructured materials such as carbon nanotube (CNT). By this way, CNT particles would behave as support for anchoring the light harvesting semiconductor QDs, leading to the enhancement of the exciton dissociation and charge transport towards the corresponding electrodes. Recently, manufacturing PSCs co-sensitized by QD loaded CNT has been shown as a promising direction to maximize performance of the device. This article reviews the recent developments in enhancement of OPVs" performance by utilization of high efficient light harvesting QDs and/or their hybrid with 1D CNTs.

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“…A thermal annealing method has been proposed for crystalline polymerbased BHJ systems [20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36] , while an additive method is currently used for less-crystalline (amorphous) polymer-based BHJ layers [37][38][39][40][41][42][43][44][45][46][47] . However, it is doubtable that such an optimized BHJ layer (system) can withstand external physical loads such as pressing, hitting, rubbing and the like when it comes to the fullerene nano-domains dispersed in the polymer:fullerene mixture structures.…”

Section: Introductionmentioning

confidence: 99%

Influence of Physical Load on the Stability of Organic Solar Cells with Polymer : Fullerene Bulk Heterojunction Nanolayers

Lee¹,

Kim²,

Kim³

2016

Current Photovoltaic Research

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ABSTRACT:We report the effect of physical load on the stability of organic solar cells under physical loads. The active layers in organic solar cells were fabricated with bulk heterojunction films (BHJ) films of poly (3-hexylthiophene) and phenyl-C61-butyric methyl ester. The loading time was varied up to 60 s by keeping the physical load constant. Results showed that the open circuit voltage was not influenced by the physical load but other solar cell parameters were sensitive to the loading time. The fill factor was very slightly increased at 15 s, while short circuit current density was well kept for 30 s. The power conversion efficiency was reasonably maintained for 45 s but became significantly decreased by the continuous loading for 60 s.

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Performance Enhancement of the P3HT/PCBM Solar Cells through NIR Sensitization Using a Small‐Bandgap Polymer

Cited by 204 publications

References 21 publications

Effect of the length of alkyl side chains in the electronic structure of conjugated polymers

Effect of the length of alkyl side chains in the electronic structure of conjugated polymers

Recent Developments in Quantum Dots/CNT Co-Sensitized Organic Solar Cells

Influence of Physical Load on the Stability of Organic Solar Cells with Polymer : Fullerene Bulk Heterojunction Nanolayers

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